Sub-surface type oil well pump



Sept 24, 1957 E. J. HANLEN y SUB-SURFACE TYPE OIL WELL PUMP Filed Aug. 27. 1956 ATTD RN EYS United States Patent Office ,Y

2,807,218 Patented p Sept. 24, A1957` 2,801,218 'SUB-SURFACE TYPE olL WELL PUMP Edward J. Hanlen, Butler, Pa.

v Application August 27, 1956, Serial No. 606,421 i 1 Claim. (c1. 10s- 158) This invention relates to a uid pump, and more particularly to a sub-surface oil well pump.

The object of the invention is to provide a pump which will permit operators to pump fluid such as oil from wells at increased eiiciency and greater economy.

Another object of the invention is to provide a subsurface iluid pump which includes a pair of tubes which are slidably connected together, there being a means provided for maintaining the parts of the pump in their proper assembled position as the pump is opera-ted, and wherein `the pump of the present invention does not use any cups or packing to create displacement or to create vacuum in the pumping motion.

A further object of the invention is to provide a subsurface oil well pump which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and in which like numerals are used to designate like parts throughout the same:

Figure 1 is a side elevational view of the pump of the present invention, with parts broken away and in section.

Figure 2 is a fragmentary longitudinal sectional view taken through the pump and showing the upper portion thereof.

Figure 3 is a View similar to Figure 2, but showing the lower portion of the pump.

Figure 4 is a sectional view taken on the line 4-4 of Figure 2.

Figure 5 is a sectional View taken on the lines- 5 of Figure 2.

Figure 6 is a sectional view taken on the line 6 6 of Figure 3.

Referring in detail to the drawings, the numerals 10 and 11 designate inner and outer tubes which are slidably connected together. There is further provided a body member 12 which has an exterorly threaded neck 13 on its upper end and the neck 13 is arranged in threaded engagement with the lower interiorly threaded portion of the tube 10, Figure 3. The body member 12 is provided with an inwardly extending angular flange 14, and a bushing 15 -is positioned in the body member 12, the bushing 15 being provided with an annular collar 16 which engages the lower surface of the flange 14. A ball 17 is mounted for movement into and out of closing or bridging relation with respect to the upper end of the bushing 15.

There is further provided a support member which is indicated generally by the numeral 18, and the support member 18 has its upper end arranged in threaded engagement with the lower portion of the body member 12. Circumposed on the support member 18 is a pair of yieldable sleeves 19 and 20 which can be made of any suitable material such as leather or plastic, and a spacer member 21 is interposed between the pair of sleeves 19 and 2). A guide member 22 is arranged in threaded engagement with the lower end of the support member 18,

and the bottom of the guide member 22 is open so that oil or other uid being pumped, can pass therethrough.

A plug 23 is provided with a lower threaded portion which threadedly engages the upper end of the inner tube 10, Figure 2. The plug 23 is provided with a plurality of equally spaced apart apertures 24, Figure 5, for a purpose to be later described. The plug 23 is further p1 ovided with a central bore 25, and a rod 26 is slidably positioned in the bore 25.y A nut 27 is arranged in threaded engagement with the lower end of the rod 26.

The numeral 28 designates a headpiece which has its lower end arranged in threaded engagement with the top of the outer tube 11. The headpiece 28 includes a lower portion 29 which is provided with a plurality of spaced apart apertures 3), and the headpiece 28 is further provided with a central threaded bore 31. The upper end of the rod 26 is threaded exteriorly as at 32, and the upper threaded portion 32 of the rod 26 is arranged in threaded engagement with the bore 31 of the headpiece 28.

Arranged in threaded engagement with the upper end of the headpiece 28 is a cage 33, and the vcage 33 is provided with a plurality of spaced apart cutouts 34. A bushing 35 is positioned within the cage 33, and a ball 36 is mounted for movement into and out of bridging or closing relation with respect to the upper end of the bushing 35. Extending upwardly from the top of the cage 33 is an exterior-ly threaded shank or stem 37, Figures 1 and 2.

From the foregoing, it is apparent that there has been provided a uid pump which is especially suitable for use in sub-surface oil wells or the like. In use the shank or stem 37 can be connected to the lower end of a pump rod and then the pump of the present invention can be inserted into a sub-surface well such as an oil Well. Then, as the pump rod is reciprocated or moved up and down, this will result in up and down movement of the cage 33. As the cage 33 moves up and down, it causes up and down movement of the headpiece 28 which in turn results in up and down movement of the outer tube 11. It is to be noted that `the inner tube 10 is stationary while the outer tube 11 slides up anad down. This movement results in oil or other tiuid being drawn in through the lower open end of the guide member 22 and this uid such as the oil passes up through the support member 18 and up through the bushing v15 whereby it raises the ball 17 and then the oil or other uid passes up through the body member 12 and through the inner tube 10. The fluid then passes up through the apertures 24 and through the registering apertures 30 and then through the bushing 35 which causes the ball 36 to be lifted. The uid can then pass out through the cutouts 34 in the cage 33. The pair of balls 36 and 17 serve as check valves which permit the oil to pass upwardly through the pump, but these balls prevent the oil from .passing downwardly.

As previously described, the ball 36 is seated in the cage 33 which is provided with the cutouts 34. Ports or apertures are provided in the headpiece 28 and plug 23. The retaining nut 27 prevents the tubes 10 and 11 from pulling apart. The seating cups 19 and 20 are preferably made of leather or other suitable material.

The present invention thus constitutes a plunger type pump which employs or uses the two tubes 10 and 11. The tubes are matched together with not too close a tolerance. In actual practice, it has been found that a tolerance of 1/32 of an inch between the diameters of the inner and outer tubes works much better than one with a real close lit. It is believed that the efficiency of the pump is higher with a maximum tolerance between the tubes on account of the weight of the oil above the pump within the tubing which aids in the pumping stroke. In other words, it is believed that the weight of the fluid acts as a fonce in lifting the rods and the outer tube over the inner tube. The apertures 24 and 30 permit the oil to travel from the lower tube up through the pump. The rod 26 and nut 27 prevent the pump from coming apart while running or from coming apart in the hole.

When using the present pump, a well can be pumped economically and eciently and no cups or packing are utilized to create displacement or to create vacuum in the pumping motion.

Iclaim: Y

Ina sub-surface pump, an inner tube, an outer tube slidably connected to said inner tube and being of greater diameter than said inner tube, said inner tube having its interior threaded adjacent the lower end thereof, a body member having an exteriorly threaded neck threadedly engaging the lower threaded portion of said inner tube, an, annular lange extending inwardly from said body member, a bushing seated in said body member and having an annular collar arranged contiguous to the bottom of. said ange, a ball engaging the upper end of said bushing, a support member having an upper portion `threadedly engaging the lower end of said body member, a pair of spaced apart yieldable sleeves circumposed on said support member, a spacer member interposed between said pair of sleeves, a guide member arranged in threaded engagement with the lower end of said support member, a plug mounted on the upper end of said inner tube and arranged in threaded engagement therewith, there being a plurality of spaced apart apertures in said plug, said plug having a central bore arranged therein, a rod slidably arranged in said bore, a nut on the lower end of said rod, a headpiece including a lower threaded section threadedly engaging the upper end of said outer tube, said headpiece -including a lower portion provided with a plurality of apertures and a central threaded bore for threadedly receiving the upper end of said rod, a cage arranged in threaded engagement with the upper end of said headpiece and said cage being provided with a plurality of spaced apart cutouts, a bushing seated in said cage, a ball arranged in engagement with said bushing, and a threaded shank extending upwardly from said cage.

References Cited in the tile of this patent UNITED STATES PATENTS 1,041,796 Hudson Oct. 22, 1912 2,344,787 Patterson et al. Mar. 21, 1944 2,460,179 Knott Jan. 25, 1949 2,580,660 Crabtree Ian. 1, 1952 2,690,134 Rite-hey Sept. 28, 1954 

